Spectrum of ID53, zoomed-in on the rest-frame wavelengths surrounding the stellar P Cygni features from N V (left) and C IV (right). A N V P Cygni feature is clearly detected. No significant P Cygni profile from C IV emission is detected in either absorption at λ₀ ≈ 1542 Å or in emission at λ₀ ≈ 1551 Å. The grey shaded regions of the spectrum are not included in the fitting as they are contaminated by nebular emission or interstellar absorption. We show the best-fit models with a single-burst and continuous star formation for a metallicity [Z/H] = −2.15 and [Z/H] = −1.15. These are the best-fit metallicities for the single-burst and continuous star formation, respectively, and are first listed in the legends. For reference, we also show the best-fit model with continuous star formation that is ongoing for 100 Myr in green, which has a best-fit [Z/H] = −2.15.